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Hi,
I tried to change the displayed language in the form by adding an add_filter in functions.php as explained here: helpful_datatables_language (https://helpful-plugin.info/docs/filters/helpful_datatables_language/).
But a fatal error occurs (Fatal error: Uncaught TypeError: Argument 1 passed to {closure}() must be of the type string, array given, called in…).
How can we change the displayed language?